Left for dead by the experts, Hillary Clinton and John McCain ride a record turnout to victory in New Hampshire. Here's what's next in a campaign whose only certainty is uncertainty

Hillary Clinton supporters rally in Manchester, New Hampshire, on January 7, 2007.

First came the fresh winds across the prairie, Mike Huckabee and Barack Obama rising fast and blowing away row upon row of tidy assumptions and dead certainties. As that front moved east, the weather changed; spring, the season of rebirth, came to New Hampshire. Snowbanks softened, toppling the yard signs; the Ice Queen melted. By nightfall, John McCain and Hillary Clinton, two veterans once left for dead, had sprung back to life.

In a race that turns out to be all about climate change, just about every forecaster was wrong  which in a...